Solahart 151J, Owner'S Manual

Page: 55 / 60

SERVICING
55
Open and Closed circuit system
14. Open the temperature pressure relief valve by holding the lever in the raised position.
This will let air into the solar storage tank and allow the water to drain through the hose.
15. If flushing the solar storage tank:
▪
Disconnect and remove the booster heating unit.
▪
Place a hose inside the tank.
▪
Open the isolation valve to the hose.
▪
Allow the hose to run until water runs clear from the hose connected to the cold water connection.
▪
When satisfied the solar storage tank is flushed, close the cold water isolation valve to the hose and remove the
hose from the tank.
▪
Replace and reconnect the booster heating unit.
16. When satisfied the solar storage tank is drained and / or flushed, remove the hose from the cold water inlet
connection.
Open circuit system
17. Reconnect the solar cold pipe to the solar storage tank and cold water pipe work to the solar cold pipe.
Closed circuit system
18. Reconnect the cold water pipe work to the solar storage tank.
19. Refit and tighten the PR6 or PR200 closed circuit relief valve on the left side of the solar storage tank.
20. Remove the hose from the valve drain port of the fill drain valve assembly.
Draining and Flushing the Solar Collectors (Open Circuit System)
21. From the bottom end of the solar collectors, unscrew and remove the end plug.
Connect a hose to the collector connection. Let the other end of the hose go to a drain.
22. From the top end of the solar collectors, unscrew and remove the end plug.
This will let air into the collector and allow the water to drain through the hose.
23. If flushing the solar collector:
▪
Connect a hose to the top collector connection. Let the other end of the hose go to a drain.
▪
Open the cold water isolation valve to the water heater.
▪
Water will flow through the solar cold and solar hot pipes into the solar collectors.
▪
Allow water to flow from the solar collectors until it is clear of any sediment.
▪
When satisfied the solar collectors are flushed, close the cold water isolation valve to the water heater.
24. When satisfied the solar collectors are drained or flushed, remove the hose(s) and reconnect the end plug(s).
Fill and Turn On the Water Heater
After the solar storage tank and solar collectors have been drained or flushed:
•
Fill and turn on the water heater. Refer to:
Closed Circuit Systems –
“Filling and Commissioning of the Storage Tank”
on page 30 and
“Filling and
Commissioning the Closed Circuit” on page 31.
Open Circuit Systems –
“Filling and Commissioning the Storage Tank and Collectors ” on page 38.
•
Remove the covering from the solar collectors.